Lidar Survey added after site modelled

Hi,

I'm struggling to add Lidar information to my original take off from PDF.

The issue I have is that the original PDF's worked from were not aligned to Eastings and Northings and were automatically zero located.

I have input all of the existing and proposed levels to gve me cut and fill for all of the components I would need.

However, a Lidar survey has been taken of the site that gives a post demolition survey.
The idea would be to introduce this after the existing topo and before the proposed levels.

The issue I am finding is that when trying to add this into my scheme it locates to it's Eastings and Northings and I can't find a way to merge and integrate this information.
The Lidar post demo survey would efectively replace the existing topo and adjust the proposed cut and flll accordingly.

Suggestions on a post card, please....


Steve